MTB Chalet in the Alps, what would be your wishlist?

An absolute bare minimum would be a secure storage area. Don't even think of going into business without it! Skiers think nothing of leaving expensive skis outside their lunch spot but mtb'ers are rightfully paranoid about leaving their bikes unattended/un-secured.

Next in priority would be at least one hose with reasonable water pressure. That's as much for your benefit as the guests!

If you're not providing a guiding service, good route info is a must

As regards tools, that would be nice. If you can only provide some tools, make sure they are the heavy/bulky ones guests aren't likely to bring out themselves.

I'm going to go against the grain here and say don't bother with tools, spares and stands.

Stuff will go missing or get broken. Then what? The next group come in with expectations that can't be met. Not to mention the potential liabilities when people mis-use the tools.

We've provided a fully equipped Pedros workshop for the last 4 years now. Sure we've had a bunch of allen keys broken when guests have stood on them to undo something they really shouldnt.. oh well.. lifetime warranty on all those tools so no big deal.
we have 6 Pedros workstands too. Even just for tweaking gears or cleaning your bike they are invaluable. In Whistler stuff gets broken so people dont want to be working on a bike laying on the ground.

As far as I can tell, we've lost zero tools. We replace track pumps and they break inside 2 weeks.

As far as thieves working while on holiday.. theres a huge potential for loss as we have had lots of our personal spares in our worksop over teh years.

Worst thing thats gone missing was an XTR shifter set from a race ike build kit. Aside from that the most bizarre was teh ratchet mechanism off some Mavic shoes. Aside from that, if anything else has gone, its probably stuff that was a bit 'meh' anyway.

So, the benefit we've had of providing a help yourself workshop environment has far outweighed the huge benefit to 99.9% of our guests vs the 0.1% who've not appreciated what we offer and have walked off with stuff.

What are the potential liabilities of providing tools? You're not doing the work for them. And of course you have liability insurance right!

Biggest thing that we don't have that I'd like is a wet/mud room attached to a laundry facility so that people don't have to walk through the chalet covered in mud/grit to get changed out of wet stuff.
We drop $500 at the end of the season on carpet cleaning as a result. A mud/wet room would really help.

Increased security on our bike storage is on the cards this year and the above suggestion of individual anchors is a very good one!

Basically if you're selling an accommodation product to bikers.. you HAVE to be geared up for everything that a biker will want to do while staying with you! Or they'll stay at the next place that does have the stuff they need.